Question

Limestone reacting with carbonic acid

is it Mechanical Weathering or Chemical Weathering?????​

Answer 1

Answer:

first one is correct answer

Answer 2

Answer:

Concept:

Carbonation is the reaction of carbonate or bicarbonate ions with minerals. The process of carbonation is also known as solution wherein atmospheric carbon dioxide after mixing with water forms carbonic acid which after reacting with carbonate rocks like limestoe forms calcium bicarbonate which is easily dissolved in water.

Find:

Limestone reacting with carbonic acid is it Mechanical Weathering or Chemical Weathering?

Given:

Limestone reacting with carbonic acid is it Mechanical Weathering or Chemical Weathering?

Explanation:

Weathering is the breakdown of rock by physical, chemical or biological processes. Limestone areas are predominantly affected by chemical weathering when rainwater, which contains a weak carbonic acid, reacts with limestone. This causes the limestone to dissolve. Carbon dioxide from the respiration of animals (and ourselves) is one cause of increased carbon dioxide in the atmosphere. Burning fossil fuels also contributes to this. Carbon dioxide in the atmosphere forms very dilute carbonic acid when it dissolves in rain.

Chemical weathering results from chemi cal changes to minerals that become un stable when they are exposed to surface conditions. The kinds of changes that take place are highly specific to the mineral and the environmental conditions. Some minerals, like quartz, are virtually unaf fected by chemical weathering, while oth ers, like feldspar, are easily altered. In general, the degree of chemical weather ing is greatest in warm and wet climates, and least in cold and dry climates. The important characteristics of surface con ditions that lead to chemical weathering are the presence of water (in the air and on the ground surface), the abundance of oxygen, and the presence of carbon diox ide, which produces weak carbonic acid when combined with water. That process, which is fundamental to most chemical weathering, can be shown as follows:

water carbon dioxide --> carbonic acid then carbonic acid -> hydrgen ion + carbonate ion

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